Start with this right here. Literally everything you need to know in order to have a successful engine break-in. JQ leaves absolutely nothing out, and I’ve passed this along countless times to people in your shoes, and they’ve had excellent results.
Also-MAKE SURE you never leave your piston at top dead center. JQ will go over this as well in the video. His nitro engine knowledge, and video is absolutely INVALUABLE for anyone new to nitro.